4.4.63
कर्माध्ययने वृत्तम्
Operational rule vidhi
The affix ठक् comes in the sense of 'this is his act, occurring in study' after a word in the Nominative 1st-Case in construction, if such a word is an कर्म (act) which has वृत्तम् (occurred) अध्ययन in (study).
Word by word (padaccheda)
Substitute / term prathamā · ekavacanaRight context अध्ययने saptamī · ekavacanaSubstitute / term वृत्तम् prathamā · ekavacana
- Substitute / term Prathamā (1st case): in operational rules, the substitute or the thing introduced; in definitions, the term or its referent.
- Right context Saptamī (7th case): "when X follows", the operation applies to what precedes (1.1.66 तस्मिन्निति निर्दिष्टे पूर्वस्य). Also a condition or domain ("in the sense of").
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Full reading
अध्ययने वृत्तम्
Pāṇini leaves out words that carry over from earlier sūtras. Expand to see the rule as a reader actually understands it.
Commentary
The affix ठक् comes in the sense of 'this is his act, occurring in study' after a word in the Nominative 1st-Case in construction, if such a word is an कर्म (act) which has वृत्तम् (occurred) अध्ययन in (study).
Thus एकमन्यदध्ययने कर्मवृत्तमस्य = ऐकान्यिकः 'a pupil who commits one (एक) error (अन्यत्) in reading', &c. literal translation being something like "one errorist". Similarly द्वैयन्यिकः त्रैयन्यिकः &c. He whose, in recitation, at the time of examination, there is the occurrence of one mistake or false reading, is called ऐकान्यिकः ॥ So who commits two mistakes is called द्वैयन्यिकः ॥ In short, in giving explanatory analysis of taddhita words like ऐकान्तिकः &c, the whole phrase अध्ययने कर्मवृत्तम् must be employed.
Śrīśa Chandra Vasu, The Ashtadhyayi of Panini (1897), via ashtadhyayi.com.